我收到以下错误TypeError: f is not a function
:我做错了什么?
var expressws = require("express");
var appws = expressws();
var expressWs = require('express-ws')(appws);
function x(ws)
{
console.log("send");
}
function loop(f,t)
{
setTimeout(() => loop(), t);
f();
}
appws.ws('/', function(ws, req) {
ws.on('message', function(msg){
var data = JSON.parse(msg);
if(data.action == "Logged in"){
loop(() => x(ws),1000);
}
});
});
答案 0 :(得分:2)
以下间接递归调用不会将任何内容作为参数传递给loop
,因此会出错。
setTimeout(() => loop(/* should pass two arguments here */), t);
答案 1 :(得分:0)
您需要将参数传递给循环函数
setTimeout(() => loop(f, t), t);
另一种方法是
setTimeout(loop.bind(null, f, t), t);
或lodash版
_.delay(loop, t, f, t);